First fluid liquid animation- feedback!
Recommendations:

Start a complete new Blender file with just the default cube.

go to quick effects -&gt; quick liquid

start the animation -&gt; looks great, right?

so you should try to keep the settings there in your file and tweak only one effect at a time to see what happens if you do that. -&gt; or watch tons of tutorial videos


Now to your file:
to improve it you can do...

decrease resolution to 64 or 128 when you are still changing things, if you render you increase this to 256 if you like, else it takes too long and your computer will slow down

for me it looks like you &quot;wildly&quot; changed some settings just to get better results - without knowing what happens. e.g.



of course you can change these values (which i personally never did and i made nice looking water simulations without it), but if you increase it that hight, i just don't wanna know how long your render time for your simulation was...1 week? ;)
So put it down to the default values 4 and 1 ...and wow...your computer and your simulation is fast again

put on all border collisions -&gt; else you got these weird results where just &quot;some&quot; water is on the floor which does not look realistic.



check liquid and don't change default settings



you got this: https://youtu.be/QAH1ljMFkEA

turn on spray, foam, bubbles




most important: Do the render in cycles. Only in cycles water looks really good and realistic. But change to cycles after you did all your settings because this also slows down your computer massively.

quick result of cycles render (bad resolution):

bit higher resolution (128)

Best recommendation: Don't use mantaflow.
Use Flip Fluids. I know -  you have to pay for it.
I know it is &quot;kind of&quot; advertising although i do not get anything from them and i don't have any relationship to the FlipFluid - addon creators.
It is just an amazing add-on which makes fluids look a lot better and - even more important - it is so much faster!!!
Here is a result of your simulation which i just did with a few clicks with FlipFluids....deleted your background, used a HDRI and ...you won't believe it ...rendered in EEVEE:
result:

aaaaand.....NOOOOOW....Cycles:

Remember: These are JUST the default settings of FlipFluids. I just assigned default materials (which are part of FlipFluids) and checked 2 checkmarks (so you can see foam + spray)